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Error (1817) Failed to Undo Existing Registration

When you see this error, go to Start | Programs | Startup. If there is a “Century repair” item there, delete it.

Next, open a command prompt. At that prompt go to the C:\Program Files\Century\TinyTERM directory. Run these two commands, one at a time:

tt /unregister
tt /register

If that does not solve the error, uninstall TinyTERM. Delete the C:\Program Files\Century folder, then reboot your PC and reinstall TinyTERM .

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